How to validate the position of nodes thrrough c# code

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Hi friends,

I need to validate an xml file.
My requirement is Coupon should come first then MaturityDate if its not coming in the specified order its an error,

How can i achieve this? will the xpath works? or any other better alternative.
Please help

C#

var ProjectedIncomePosition = Xele.Descendants("ProjectedIncomePosition");
           foreach(var coupon in ProjectedIncomePosition)
           {
               //XmlDocument xml = new XmlDocument();
               //xml.LoadXml(coupon.ToString());
               //int position =xml.SelectNodes("//Coupon[position()]");

           }

XML

<ProjectedIncomePosition>
		<KeyAcct i:nil="true"/>		
		<Mod1Code>STK</Mod1Code>		
		<ExchangeRate>0</ExchangeRate>
		<CallDate i:nil="true"/>
		<Coupon>0.59</Coupon>		
		<IsExternal>false</IsExternal>
		<MaturityDate/>
		<PreRefundedDate i:nil="true"/>		
		<EstimatedIncome>6.28980</EstimatedIncome>
</ProjectedIncomePosition>

Posted 23-Nov-15 21:33pm

jinesh sam

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2 solutions

Solution 2

What you are trying to do is purely the role of a .xsd xml schema definition, and should be handled this way.

Defining a schema would allow you to clearly and definitely define the valid content of your xml file (including tags, how much of them are allowed, and their respective orders), and to programmatically validate a specific xml file againt the schema.

A few links:
XML Schema (W3C) (Wikipedia)[^]
W3C XML Schema Definition Language (XSD) 1.1[^]
XML Schema Tutorial (w3schools)[^]

Posted 23-Nov-15 23:02pm

phil.o

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jinesh sam 24-Nov-15 20:15pm

Thanks phil:)

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Manas_Kumar · Accepted Answer · 2015-11-23T22:53:00

Try with below code:

C#

string xmlData = @"<projectedincomeposition><keyacct xmlns:h="true" /><mod1code>STK</mod1code><exchangerate>0</exchangerate><coupon>0.59</coupon><isexternal>false</isexternal><maturitydate /></projectedincomeposition>";

// Getting all elements
IEnumerable<XElement> roots = XElement.Parse(xmlData).Elements();

// Coupon index
int coupon = roots.Select((item, index) => new { elementName = item.Name, Index = index }).Where(p => p.elementName == "Coupon").Select(p => p.Index + 1).FirstOrDefault();

// Maturity Date Index
int maturityDate = roots.Select((item, index) => new { elementName = item.Name, Index = index }).Where(p => p.elementName == "MaturityDate").Select(p => p.Index + 1).FirstOrDefault();

if (coupon < maturityDate)
{
	// Correct
}
else
{
	// Incorrect data
}